JPH0876351A - Phase shift mask and its production - Google Patents
Phase shift mask and its productionInfo
- Publication number
- JPH0876351A JPH0876351A JP21163994A JP21163994A JPH0876351A JP H0876351 A JPH0876351 A JP H0876351A JP 21163994 A JP21163994 A JP 21163994A JP 21163994 A JP21163994 A JP 21163994A JP H0876351 A JPH0876351 A JP H0876351A
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- JP
- Japan
- Prior art keywords
- thin film
- film
- transparent
- phase shift
- shift mask
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- Preparing Plates And Mask In Photomechanical Process (AREA)
- Exposure Of Semiconductors, Excluding Electron Or Ion Beam Exposure (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、位相シフトマスク、特
にハーフトーン型位相シフトマスクおよびその作製方法
に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a phase shift mask, especially a halftone type phase shift mask, and a method of manufacturing the same.
【０００２】[0002]
【従来の技術】位相シフトマスクは、超解像露光の一方
式としてメモリ等の高集積化に有望視されている。特に
ハーフトーン型位相シフトマスクは、コンタクトホール
の形成に有効であり、出来上がり形状，工程，および作
成に必要なデータ数が、従来マスクとほとんど変わらな
いことから実用性も高いと期待されている。ハーフトー
ン型位相シフトマスクには、２層構造型と単層構造型の
２種類がある。2. Description of the Related Art Phase shift masks are considered promising for high integration of memories and the like as one method of super-resolution exposure. In particular, the halftone type phase shift mask is effective for forming contact holes, and is expected to be highly practical because the finished shape, the process, and the number of data required for preparation are almost the same as those of the conventional mask. There are two types of halftone phase shift masks, a two-layer structure type and a single-layer structure type.
【０００３】２層構造型は、透過率を制御する金属薄膜
層と位相量を制御する透明薄膜層とから構成されてい
る。２層構造型の欠点は、上部の層が、洗浄工程で剥が
れ易い等、機械的強度が脆弱であること、２回の成膜工
程が必要なことである。The two-layer structure type is composed of a metal thin film layer for controlling the transmittance and a transparent thin film layer for controlling the phase amount. A drawback of the two-layer structure type is that the upper layer is fragile in mechanical strength such as being easily peeled off in the cleaning step, and two film forming steps are required.
【０００４】単層構造型は、岩淵らによりジャパニーズ
ジャーナル・オブ・アプライド・フィジクス，第３２
巻，頁５９００−５９０２（１９９３）に報告されてお
り、１種類の薄膜で透過率と位相量を制御するので、機
械的強度の問題，工程数増加の問題は解決される。しか
し、位相シフト効果に必要な特定の透過率，屈折率を、
化学量的組成の薄膜から得ることは極めて困難であるた
め、成膜時に薄膜を構成する元素の構成比を調整するこ
とが必要となる。このようにして得られる薄膜は、スト
イキオメトリックな膜に較べて安定性に乏しい。またエ
ッチングも、速度，終点検出等が困難であることが多
く、位相誤差が大きくなり易い。The single-layer structure type is described in Iwabuchi et al., Japanese Journal of Applied Physics, No. 32.
Vol. 5, pp. 5900-5902 (1993). Since the transmittance and the phase amount are controlled by one kind of thin film, the problem of mechanical strength and the problem of increasing the number of steps are solved. However, the specific transmittance and refractive index required for the phase shift effect are
Since it is extremely difficult to obtain from a thin film having a stoichiometric composition, it is necessary to adjust the composition ratio of the elements forming the thin film during film formation. The thin film thus obtained is less stable than a stoichiometric film. In addition, in etching, it is often difficult to detect the speed and the end point, and the phase error tends to increase.
【０００５】[0005]
【発明が解決しようとする課題】このように従来の技術
では、機械的強度および安定性に優れ、位相誤差が許容
範囲内に抑えられたハーフトーン型位相シフトマスクを
得ることは困難である。As described above, according to the conventional technique, it is difficult to obtain a halftone type phase shift mask excellent in mechanical strength and stability and having a phase error suppressed within an allowable range.
【０００６】本発明の目的は、このような従来技術の問
題点を解決した、ハーフトーン型位相シフトマスクを提
供することにある。An object of the present invention is to provide a halftone type phase shift mask which solves the problems of the prior art.
【０００７】本発明の他の目的は、このようなハーフト
ーン型位相シフトマスクの作製方法を提供することにあ
る。Another object of the present invention is to provide a method of manufacturing such a halftone type phase shift mask.
【０００８】[0008]
【課題を解決するための手段】本発明の位相シフトマス
クは、透明ガラス基板と、前記透明ガラス基板上に開口
部が得られるようにパターニングされ、透過光に対して
光学的な位相差を与える半透明薄膜と、前記透明ガラス
基板上の開口部に形成された透明薄膜とを備え、前記透
明薄膜の厚さは、前記透明薄膜と前記半透明膜の露光波
長における光路長差が半波長の奇数倍となるように決定
されることを特徴とする。A phase shift mask of the present invention is patterned so that an opening is formed on a transparent glass substrate and the transparent glass substrate, and gives an optical phase difference to transmitted light. A semitransparent thin film and a transparent thin film formed in the opening on the transparent glass substrate, the thickness of the transparent thin film, the optical path length difference at the exposure wavelength of the transparent thin film and the semitransparent film is a half wavelength. It is characterized in that it is determined to be an odd multiple.
【０００９】また本発明は、透明ガラス基板上に、透過
光に対して光学的な位相差を与える半透明材料からなる
マスクパターンを形成した露光用マスクの作製方法にお
いて、透明ガラス基板上に開口部が得られるように半透
明薄膜をパターニングする工程と、前記透明ガラス基板
を、パターニング面が内側となり、裏面が外側となるよ
うに成膜室に装着する工程と、光化学分解を起こして透
明薄膜を前記開口部に形成する原料ガスを前記成膜室に
導入する工程と、前記透明ガラス基板を通して、前記原
料ガスが吸収し分解する波長の光を、前記透明薄膜と前
記半透明膜の露光波長における光路長差が半波長の奇数
倍となるまで、照射し続ける工程と、を含むことを特徴
とする。Further, according to the present invention, there is provided a method for producing an exposure mask, comprising a transparent glass substrate and a mask pattern made of a semitransparent material which gives an optical phase difference to transmitted light. Patterning a semi-transparent thin film so that a portion is obtained, a step of mounting the transparent glass substrate in a film forming chamber so that the patterning surface is on the inside and the back surface is on the outside, and the transparent thin film is caused by photochemical decomposition. A step of introducing a raw material gas for forming the opening into the film forming chamber, and light of a wavelength that the raw material gas absorbs and decomposes through the transparent glass substrate, and the exposure wavelength of the transparent thin film and the semitransparent film. Irradiation is continued until the difference in optical path length in (1) becomes an odd multiple of a half wavelength.
【００１０】[0010]
【作用】光ＣＶＤは、光化学反応によって原料ガスを分
解し、薄膜を形成する技術である。光ＣＶＤでは、取り
つけられた窓を通して光を照射することによって原料ガ
スを分解し、成膜室内の基板上に薄膜を形成することを
目的としているが、基本的に原料ガスが存在し、且つ光
が到達する領域であればどこでも薄膜は形成される。従
って、窓として光ＣＶＤに用いる光を遮光する膜をパタ
ーニングされた透明ガラス基板を用いれば、遮光膜の開
口部にのみ薄膜形成を生じさせることができる。Function Photo CVD is a technique for decomposing a raw material gas by a photochemical reaction to form a thin film. In the photo-CVD, the source gas is decomposed by irradiating light through the attached window to form a thin film on the substrate in the deposition chamber, but basically, the source gas exists and the A thin film can be formed in any area where is reached. Therefore, if a transparent glass substrate patterned with a film for shielding light used for photo-CVD as a window is used, a thin film can be formed only in the opening of the light shielding film.
【００１１】本発明は、このことを利用してハーフトー
ン型位相シフトマスクを作製するものである。あらかじ
め露光光を３〜２０％しか透過しない半透明性薄膜をパ
ターニングしたマスク基板を、このパターニング面が内
側になるように光ＣＶＤチャンバの窓部に装着し、チャ
ンバ内に透明性薄膜を形成するための原料ガスを導入す
る。The present invention utilizes this fact to fabricate a halftone type phase shift mask. A mask substrate on which a semi-transparent thin film that transmits only 3 to 20% of exposure light is patterned in advance is attached to the window of the photo-CVD chamber so that the patterned surface is on the inside, and a transparent thin film is formed in the chamber. The raw material gas for introducing is introduced.
【００１２】半透明性薄膜の膜厚ｔ1 は、透過率をＴ，
露光波長における吸収係数をαとすると、下式（１）を
満たすように決定する。The thickness t 1 of the semi-transparent thin film is defined by the transmittance T,
Letting α be the absorption coefficient at the exposure wavelength, it is determined so as to satisfy the following expression (1).
【００１３】 Ｔ＝ｅｘｐ（−α×ｔ1 ） （１） このマスク基板の裏面から原料ガスが吸収し分解する波
長の光を照射すると、半透明性薄膜パターンの開口部に
は透明性薄膜が堆積するが、半透明性薄膜パターン上に
は十分な光量が到達しないために堆積は生じない。半透
明性薄膜と透明薄膜の露光波長における位相差が半波長
の奇数倍となるまで成膜を継続することによって、ハー
フトーン型の位相シフトマスクを得ることができる。T = exp (−α × t 1 ) (1) When a light having a wavelength that the raw material gas absorbs and decomposes from the back surface of the mask substrate, a transparent thin film is formed in the opening of the semitransparent thin film pattern. Although it is deposited, it does not occur because a sufficient amount of light does not reach the semitransparent thin film pattern. A halftone phase shift mask can be obtained by continuing film formation until the phase difference at the exposure wavelength of the semitransparent thin film and the transparent thin film becomes an odd multiple of the half wavelength.
【００１４】透明薄膜の膜厚ｔ2 は、半透明薄膜の屈折
率をｎ1 ，透明薄膜の屈折率をｎ2 ，露光波長をλとす
ると、下式（２）を満たすように決定する。Thickness t of transparent thin film2Is the refraction of a semitransparent thin film
Rate n1, The refractive index of the transparent thin film is n2 , Let the exposure wavelength be λ
Then, it is determined so as to satisfy the following expression (2).
【００１５】 （２π／λ）〔（ｎ2 −１）ｔ2 −（ｎ1 ＋１）ｔ1 〕＝ （２ｍ＋１）π （２） （ｍ＝０，１，２，・・・・・） 本発明においては２層構造を用いていないため、洗浄工
程においても十分な耐性を持っている。また本発明にお
いては、開口部と遮光部の位相差を開口部に形成する透
明膜厚で調整できるので、半透明薄膜の材料選択の幅は
広く、エッチング速度が十分に大きく、基板との選択比
も大きくとれるＣｒ，Ｓｉ，Ａｌ等を用いることができ
る。また透明薄膜の成膜速度はマスク基板面内でほぼ均
一なので、位相誤差は小さく抑えることができる。また
本発明は、半透明性薄膜，透明性薄膜の材料として、い
ずれも自然界に存在する組成比の材料を用いることが可
能なので、膜質の変化は生じにくく安定である。(2π / λ) [(n 2 −1) t 2 − (n 1 +1) t 1 ] = (2m + 1) π (2) (m = 0, 1, 2, ...) Since the invention does not use the two-layer structure, it has sufficient resistance even in the washing step. Further, in the present invention, since the phase difference between the opening portion and the light shielding portion can be adjusted by the transparent film thickness formed in the opening portion, the selection range of the material of the semitransparent thin film is wide, the etching rate is sufficiently large, and the selection with the substrate is performed. It is possible to use Cr, Si, Al, or the like, which has a large ratio. Moreover, since the film forming rate of the transparent thin film is substantially uniform in the plane of the mask substrate, the phase error can be suppressed to a small level. Further, in the present invention, since the material having the composition ratio existing in the natural world can be used as the material of the semitransparent thin film and the transparent thin film, the change of the film quality hardly occurs and it is stable.
【００１６】[0016]
【実施例】以下、本発明をＡｒＦエキシマレーザ露光用
のハーフトーン型位相シフトマスクに適用した実施例を
図面を参照して詳細に行う。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the present invention is applied to a halftone type phase shift mask for ArF excimer laser exposure will be described in detail with reference to the drawings.
【００１７】本実施例の位相シフトマスクの構造を、そ
の作製方法とともに説明する。The structure of the phase shift mask of this embodiment will be described together with its manufacturing method.
【００１８】図１は、本実施例の位相シフトマスクの作
製方法の各工程を表す模式図である。FIG. 1 is a schematic view showing each step of the method of manufacturing the phase shift mask of this embodiment.
【００１９】まず、図１（ａ）に示すように、合成石英
基板１上に半透明部となるＳｉ薄膜２を蒸着により１０
０〜３００オングストロームの厚さに成膜する。First, as shown in FIG. 1A, a Si thin film 2 to be a semi-transparent portion is formed on a synthetic quartz substrate 1 by vapor deposition 10
The film is formed to a thickness of 0 to 300 angstrom.
【００２０】次に、図１（ｂ）に示すように、所望形状
の開口部３が得られるようにパターニングする。Next, as shown in FIG. 1B, patterning is performed so that the opening 3 having a desired shape is obtained.
【００２１】続いて、合成石英基板１を光ＣＶＤチャン
バにパターニング面が内側となるように固定する。Subsequently, the synthetic quartz substrate 1 is fixed to the photo-CVD chamber so that the patterning surface faces inside.
【００２２】図２に、光ＣＶＤチャンバ４の構造および
光ＣＶＤチャンバに合成石英基板１を装着した状態を示
す。光ＣＶＤチャンバ４は、底部に窓部６が設けられて
おり、この窓部を通して基板を照射するように低圧水銀
ランプ７が設けられている。また、チャンバ内に原料ガ
スを供給する供給管８と、排気管９が設けられ、排気管
はロータリーポンプ１０に連絡されている。FIG. 2 shows the structure of the photo-CVD chamber 4 and the state in which the synthetic quartz substrate 1 is mounted in the photo-CVD chamber. The photo CVD chamber 4 is provided with a window 6 at the bottom, and a low pressure mercury lamp 7 is provided so as to irradiate the substrate through the window. Further, a supply pipe 8 for supplying a raw material gas and an exhaust pipe 9 are provided in the chamber, and the exhaust pipe is connected to a rotary pump 10.
【００２３】合成石英基板１は、パターニング面とは反
対側の裏面が、チャンバ３の窓部６に装着される。従っ
て、パターニング面は、チャンバ内に向いている。The synthetic quartz substrate 1 is mounted on the window portion 6 of the chamber 3 on the back surface opposite to the patterning surface. Therefore, the patterning surface faces into the chamber.
【００２４】供給管８から、原料ガスとしてジシラン
（Ｓｉ2 Ｈ6 ）と亜酸化窒素（Ｎ2 Ｏ）を流しながら、
低圧水銀ランプ７により１８４．９ｎｍ光をチャンバ４
の窓部６を経て合成石英基板１の裏面に照射する。While supplying disilane (Si 2 H 6 ) and nitrous oxide (N 2 O) as source gases from the supply pipe 8,
The low-pressure mercury lamp 7 emits 184.9 nm light into the chamber 4.
The back surface of the synthetic quartz substrate 1 is irradiated with light through the window portion 6 of FIG.
【００２５】開口部３には、透明性薄膜であるＳｉＯ2
薄膜５が堆積するが、半透明性薄膜パターン上には十分
な光量が到達しないために堆積は生じない。位相シフタ
膜となるＳｉＯ2 膜５は、１５００〜１７００オングス
トロームの厚さに形成する。In the opening 3, SiO 2 which is a transparent thin film is formed.
Although the thin film 5 is deposited, the deposition does not occur because a sufficient amount of light does not reach the semitransparent thin film pattern. The SiO 2 film 5 serving as the phase shifter film is formed to have a thickness of 1500 to 1700 angstrom.
【００２６】以上のようにして、最終的に図１（ｃ）に
示すようなハーフトーン型位相シフトマスクが作製され
る。As described above, the halftone type phase shift mask as shown in FIG. 1C is finally manufactured.
【００２７】このようにして得られた、ハーフトーン型
位相シフトマスクは、Ｓｉ薄膜２でのＡｒＦエキシマレ
ーザ光透過率が５〜２０％、Ｓｉ薄膜２を透過した光と
ＳｉＯ2 膜５を透過した光の位相差が１８０度±５度で
あった。The halftone phase shift mask thus obtained has an ArF excimer laser light transmittance of 5 to 20% in the Si thin film 2 and the light transmitted through the Si thin film 2 and the SiO 2 film 5 are transmitted. The phase difference of the generated light was 180 ° ± 5 °.
【００２８】本発明においては、位相シフタおよび半透
明部分が単層構造であるため、洗浄に対する強度は十分
に高い。また本発明では位相シフタ部分はストイキオメ
トリックなＳｉＯ2 、半透明部分はＳｉ単体であるた
め、長期間の使用で膜質に変化が生じることはなく、極
めて安定である。Ｓｉ表面は徐々に自然酸化膜で覆われ
てゆくが、厚みは数十オングストローム程度で位相量や
透過率に影響を与えることはない。また本発明において
エッチングが必要になるのはＳｉ薄膜のパターニング時
のみであり、ＣＣｌ4 等のエッチャントガスにより高い
選択比で容易にエッチングできる。In the present invention, since the phase shifter and the semitransparent portion have a single layer structure, the strength against cleaning is sufficiently high. Further, in the present invention, since the phase shifter portion is stoichiometric SiO 2 and the semitransparent portion is simple substance of Si, the film quality does not change even after long-term use, and is extremely stable. The Si surface is gradually covered with a natural oxide film, but the thickness is about several tens of angstroms and does not affect the phase amount or the transmittance. Further, in the present invention, etching is required only when patterning a Si thin film, and etching can be easily performed with a high selectivity by an etchant gas such as CCl 4 .
【００２９】上記実施例においてはＳｉ薄膜２の形成に
蒸着を用いているが、形成方法はスパッタでもＣＶＤで
も構わない。また半透明部分にＳｉを用いているがＣｒ
でもＡｌでも構わない。ただし膜厚は各々の消衰係数に
応じて変える必要がある。この際、透明薄膜の膜厚も半
透明部分での位相シフトに応じて変えることが必要なの
は言うまでもない。Although vapor deposition is used to form the Si thin film 2 in the above embodiment, the forming method may be either sputtering or CVD. Moreover, although Si is used for the semi-transparent portion, Cr is used.
However, Al may be used. However, it is necessary to change the film thickness according to each extinction coefficient. At this time, it goes without saying that the film thickness of the transparent thin film also needs to be changed according to the phase shift in the semitransparent portion.
【００３０】また、透明膜としたＳｉＯ2 膜を用いてい
るがＡｌ2 Ｏ3 膜でも構わない。この場合、原料ガスと
してはＴＭＡ，ＤＭＡ等の有機金属材料、およびＮ2 Ｏ
を用い、屈折率に応じた膜厚を形成する。Although the SiO 2 film used as the transparent film is used, an Al 2 O 3 film may be used. In this case, the source gas is an organic metal material such as TMA or DMA, and N 2 O.
Is used to form a film thickness according to the refractive index.
【００３１】また、成膜用の光源に低圧水銀ランプを用
いているが、重水素ランプ、ＡｒＦエキシマレーザでも
構わない。Although a low pressure mercury lamp is used as a light source for film formation, a deuterium lamp or an ArF excimer laser may be used.
【００３２】[0032]
【発明の効果】以上、説明したように本発明によれば、
機械的強度に優れ、長期間の使用でもマスク材料が安定
なハーフトーン型位相シフトマスクを、位相誤差±５度
の精度で作製することができる。As described above, according to the present invention,
A halftone type phase shift mask having excellent mechanical strength and stable mask material even after long-term use can be manufactured with a phase error of ± 5 degrees.
【図１】本発明を適用した実施例を示す模式図である。FIG. 1 is a schematic view showing an embodiment to which the present invention is applied.
【図２】チャンバの構造を示す図である。FIG. 2 is a diagram showing a structure of a chamber.
１ 合成石英基板 ２ Ｓｉ薄膜 ３ 開口部 ４ 光ＣＶＤチャンバ ５ ＳｉＯ2 膜 ６ 窓部 ７ 低圧水銀ランプ ８ 供給管 ９ 排気管 １０ ロータリーポンプ1 Synthetic Quartz Substrate 2 Si Thin Film 3 Opening 4 Photo CVD Chamber 5 SiO 2 Film 6 Window 7 Low Pressure Mercury Lamp 8 Supply Pipe 9 Exhaust Pipe 10 Rotary Pump
Claims (4)
ニングされ、透過光に対して光学的な位相差を与える半
透明薄膜と、 前記透明ガラス基板上の開口部に形成された透明薄膜と
を備え、 前記透明薄膜の厚さは、前記透明薄膜と前記半透明膜の
露光波長における光路長差が半波長の奇数倍となるよう
に決定されることを特徴とする位相シフトマスク。1. A transparent glass substrate, a semi-transparent thin film which is patterned so as to obtain an opening on the transparent glass substrate and gives an optical phase difference to transmitted light, and an opening on the transparent glass substrate. A transparent thin film formed in a portion, the thickness of the transparent thin film is determined so that the optical path length difference at the exposure wavelength of the transparent thin film and the semitransparent film is an odd multiple of a half wavelength. And a phase shift mask.
明薄膜はＳｉＯ2 薄膜であることを特徴とする請求項１
記載の位相シフトマスク。2. The semi-transparent thin film is a Si thin film, and the transparent thin film is a SiO 2 thin film.
The described phase shift mask.
的な位相差を与える半透明材料からなるマスクパターン
を形成した露光用マスクの作製方法において、 透明ガラス基板上に開口部が得られるように半透明薄膜
をパターニングする工程と、 前記透明ガラス基板を、パターニング面が内側となり、
裏面が外側となるように成膜室に装着する工程と、 光化学分解を起こして透明薄膜を前記開口部に形成する
原料ガスを前記成膜室に導入する工程と、 前記透明ガラス基板を通して、前記原料ガスが吸収し分
解する波長の光を、前記透明薄膜と前記半透明膜の露光
波長における光路長差が半波長の奇数倍となるまで、照
射し続ける工程と、を含むことを特徴とする位相シフト
マスクの作製方法。3. A method for producing an exposure mask, comprising a transparent glass substrate and a mask pattern made of a semi-transparent material that gives an optical phase difference to transmitted light, wherein an opening is formed on the transparent glass substrate. Patterning a semi-transparent thin film so that the transparent glass substrate, the patterning surface is the inner side,
The step of mounting the film in the film forming chamber so that the back surface is on the outside, the step of introducing a raw material gas that causes photochemical decomposition to form a transparent thin film in the opening into the film forming chamber, the transparent glass substrate, and A step of continuously irradiating with light having a wavelength that the raw material gas absorbs and decomposes until the optical path length difference at the exposure wavelength of the transparent thin film and the semitransparent film becomes an odd multiple of a half wavelength. Method for manufacturing phase shift mask.
明薄膜はＳｉＯ2 薄膜であり、前記原料ガスは、Ｓｉ2
Ｈ6 とＮ2 Ｏであり、前記照射される光は、１８４．９
ｎｍ光であることを特徴とする請求項３記載の位相シフ
トマスクの作製方法。4. The semitransparent thin film is a Si thin film, the transparent thin film is a SiO 2 thin film, and the source gas is Si 2
H 6 and N 2 O, the irradiation light is 184.9
4. The method for producing a phase shift mask according to claim 3, wherein the light is nm light.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21163994A JP2671816B2 (en) | 1994-09-06 | 1994-09-06 | Method for manufacturing phase shift mask |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21163994A JP2671816B2 (en) | 1994-09-06 | 1994-09-06 | Method for manufacturing phase shift mask |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0876351A true JPH0876351A (en) | 1996-03-22 |
| JP2671816B2 JP2671816B2 (en) | 1997-11-05 |
Family
ID=16609113
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP21163994A Expired - Lifetime JP2671816B2 (en) | 1994-09-06 | 1994-09-06 | Method for manufacturing phase shift mask |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2671816B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6632574B1 (en) | 1998-07-06 | 2003-10-14 | Canon Kabushiki Kaisha | Mask having pattern areas whose transmission factors are different from each other |
| KR100451952B1 (en) * | 2002-09-17 | 2004-10-08 | 김진곤 | A phase retardation plate manufacturing method and a phase retardation plate manufactured by the method |
| CN107102511A (en) * | 2016-02-19 | 2017-08-29 | 力晶科技股份有限公司 | Phase shift photomask and method of manufacturing the same |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04149553A (en) * | 1990-10-12 | 1992-05-22 | Mitsubishi Electric Corp | Phase shift mask |
| JPH05197160A (en) * | 1992-01-20 | 1993-08-06 | Toshiba Corp | Pattern forming method |
| JPH05210231A (en) * | 1992-01-31 | 1993-08-20 | Sharp Corp | Phase shift mask and its production |
-
1994
- 1994-09-06 JP JP21163994A patent/JP2671816B2/en not_active Expired - Lifetime
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04149553A (en) * | 1990-10-12 | 1992-05-22 | Mitsubishi Electric Corp | Phase shift mask |
| JPH05197160A (en) * | 1992-01-20 | 1993-08-06 | Toshiba Corp | Pattern forming method |
| JPH05210231A (en) * | 1992-01-31 | 1993-08-20 | Sharp Corp | Phase shift mask and its production |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6632574B1 (en) | 1998-07-06 | 2003-10-14 | Canon Kabushiki Kaisha | Mask having pattern areas whose transmission factors are different from each other |
| US6816233B2 (en) | 1998-07-06 | 2004-11-09 | Canon Kabushiki Kaisha | Mask having pattern areas whose transmission factors are different from each other |
| KR100451952B1 (en) * | 2002-09-17 | 2004-10-08 | 김진곤 | A phase retardation plate manufacturing method and a phase retardation plate manufactured by the method |
| CN107102511A (en) * | 2016-02-19 | 2017-08-29 | 力晶科技股份有限公司 | Phase shift photomask and method of manufacturing the same |
| CN107102511B (en) * | 2016-02-19 | 2021-09-03 | 力晶积成电子制造股份有限公司 | Phase shift photomask and method of manufacturing the same |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2671816B2 (en) | 1997-11-05 |
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